/*
 * Copyright 2021-2022 Alibaba Group Holding Ltd.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.aliyun.fastmodel.core.tree.statement.rule.strategy;

import com.aliyun.fastmodel.core.tree.expr.enums.ArithmeticOperator;
import lombok.Getter;

/**
 * 波动值比较
 *
 * @author panguanjing
 * @date 2021/5/29
 */
public enum VolOperator {

    /**
     * 绝对值
     */
    ABS(ArithmeticOperator.MOD),
    /**
     * 上升
     */
    INCREASE(ArithmeticOperator.ADD),
    /**
     * 下降
     */
    DECREASE(ArithmeticOperator.SUBTRACT);

    @Getter
    private ArithmeticOperator arithmeticOperator;

    private VolOperator(ArithmeticOperator arithmeticOperator) {
        this.arithmeticOperator = arithmeticOperator;
    }

    public static VolOperator toVolOperator(ArithmeticOperator arithmeticOperator) {
        for (VolOperator volOperator : VolOperator.values()) {
            if (volOperator.getArithmeticOperator() == arithmeticOperator) {
                return volOperator;
            }
        }
        return null;
    }
}
